Issue 4649 - Allow filtering by WEBSOCKET request type

skin/devtools-panel.css

 *
 {
   font-family: 'Lucida Grande', 'Segoe UI', Ubuntu, Tahoma, Arial, sans-serif;
   font-size: 11px;
   box-sizing: border-box;
 }
 
 html
 {
   height: 100%;
@@ skipping 98 matching lines @@
 #items[data-filter-type=SUBDOCUMENT]    tr:not([data-type=SUBDOCUMENT]),
 #items[data-filter-type=IMAGE]          tr:not([data-type=IMAGE]),
 #items[data-filter-type=STYLESHEET]     tr:not([data-type=STYLESHEET]),
 #items[data-filter-type=SCRIPT]         tr:not([data-type=SCRIPT]),
 #items[data-filter-type=OBJECT]         tr:not([data-type=OBJECT]),
 #items[data-filter-type=XMLHTTPREQUEST] tr:not([data-type=XMLHTTPREQUEST]),
 #items[data-filter-type=FONT]           tr:not([data-type=FONT]),
 #items[data-filter-type=PING]           tr:not([data-type=PING]),
 #items[data-filter-type=POPUP]          tr:not([data-type=POPUP]),
 #items[data-filter-type=ELEMHIDE]       tr:not([data-type=ELEMHIDE]),
+#items[data-filter-type=WEBSOCKET]      tr:not([data-type=WEBSOCKET]),
 #items[data-filter-type=OTHER]          tr:not([data-type=OTHER])
 {
   display: none;
 }
 
 .changed, .unnamed
 {
   font-style: italic
 }
 
@@ skipping 70 matching lines @@
   margin-bottom: 0;
   transition: margin-bottom 0.5s;
 }
 
 #reload
 {
   color: blue;
   text-decoration: underline;
   cursor: pointer;
 }